Preamble Reciting a Travel Trailer is a Structural Limitation – Avoiding Assertions of Intended Use
| November 26, 2019
In Re: David Fought, Martin Clanton.
November 4, 2019
Newman, Moore and Chen
Summary
This decision provides an excellent example of when a limitation in a preamble is given patentable weight. The decision also illustrates arguments which will not be successful. The Federal Circuit held that not only was the preamble limiting, but also held that a “travel trailer” is considered a specific type of recreation vehicle having structural distinctions.
Background
The patent application contains two independent claims:
1. A travel trailer having a first and second compartment therein separated by a wall assembly which is movable so as to alter the relative dimensions of the first and second compartments without altering the exterior appearance of the travel trailer.
2. A travel trailer having a front wall, rear wall, and two side walls with a first and a second compartment therein, those compartments being separated by a wall assembly, the wall assembly having a forward wall and at least one side member,
the side member being located adjacent to and movable in parallel with respect to a side wall of the trailer, and
the wall assembly being moved along the longitudinal length of the trailer by drive means positioned between the side member and the side wall. (Emphasis added)
The examiner rejected claim 1 as anticipated by a reference describing a conventional truck trailer such as a refrigerated trailer, and rejected claim 2 as anticipated over another reference describing a bulkhead for shipping compartments. The applicants appealed the rejections by (1) arguing that the claims do not have a preamble, (2) arguing that a travel trailer is a type of recreational vehicle, as supported by extrinsic evidence, and (3) arguing that the Examiner erred by rejecting the claims without addressing the level of ordinary skill.
Discussion
The CAFC reviewed the Board’s legal conclusions (involving claim construction) de novo and reviewed the factual findings (involving the extrinsic evidence) for substantial evidence.
The effect of a preamble is treated as a claim construction issue. The CAFC was not persuaded by the argument that the claims do not have a preamble because a traditional transitional phrase such as “comprising” was not used. The CAFC explained that although a traditional transitional phrase was not used, the word “having” performs the role of a transitional phrase. As such, this argument was not persuasive.
The next argument, however, was found persuasive. In particular, the CAFC has repeatedly held that a preamble is limiting when it serves as antecedent basis for a term appearing in the body of the claim. See, e.g., C.W. Zumbiel Co., 702 F.3d at 1385; Bell Commc’ns Re-search, Inc. v. Vitalink Commc’ns Corp., 55 F.3d 615, 620–21 (Fed. Cir. 1995); Electro Sci. Indus., Inc. v. Dynamic De-tails, Inc., 307 F.3d 1343, 1348 (Fed. Cir. 2002); Pacing Techs., LLC v. Garmin Int’l, Inc., 778 F.3d 1021, 1024 (Fed. Cir. 2015). As seen in claims 1 and 2 above, each claim refers back to the preamble.
With respect to the meaning of “travel trailer”, the PTAB quoted relevant portions of the extrinsic evidence:
“Recreational vehicles” or “RVs,” as referred to herein, can be motorized or towed, but in general have a living area which provides shelter from the weather as well as personal conveniences for the user, such as bathroom(s), bedroom(s), kitchen, dining room, and/or family room. Each of these rooms typically forms a separate compartment within the vehicle . . . . A towed recreational vehicle is generally referred to as a “travel trailer.”
Probably the single most-popular class of towable RV is the Travel Trailer. Spanning 13 to 35 feet long, travel trailers are designed to be towed by cars, vans, and pickup trucks with only the addition of a frame or bumper mounted hitch. Single axles are common, but dual and even triple axles may be found on larger units to carry the load.
In regard to the meaning of “travel trailer”, the extrinsic evidence shows that “travel trailer” connotes a specific structure of towability which is not an intended use. In addition, the extrinsic evidence shows that recreational vehicles and travel trailers have living space rather than cargo space, which also is not an intended use. As such, “travel trailer” is a specific type of recreational vehicle and the term is a structural limitation.
The CAFC thus concludes:
“There is no dispute that if “travel trailer” is a limitation, Dietrich and McDougal, which disclose cargo trailers and shipping compartments, do not anticipate. Just as one would not confuse a house with a warehouse, no one would confuse a travel trailer with a truck trailer.”
The argument that the PTAB erred for failing to explicitly state the level of ordinary skill was a loser:
“Unless the patentee places the level of ordinary skill in the art in dispute and explains with particularity how the dispute would alter the outcome, neither the Board nor the examiner need articulate the level of ordinary skill in the art. We assume a proper determination of the level of ordinary skill in the art as required by Phillips.”
Takeaways
- The preamble is limiting when it serves as antecedent basis for a term appearing in the body of the claim.
- A term in the preamble can be construed as a structural limitation and not merely a statement of intended use when the evidence supports such meaning.
